Welt-controlling mechanism.



W. B. KING.

WELT CONTROLLING MECHANISM.

APPLIOATION FILED MAR. '7, 1912.

1,071,435, Patented Aug. 26, 1913.

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m )WMM m I B. KING. WELT CONTROLLING MECHANISM.

APPLICATION FILED MAR.

Patented Aug. 26, 1913.

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W. B. KING.

WELT CONTROLLING MECHANISM.

APPLICATION FILED MAR. 7, 1912.

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fifielttol ZhaM/Z d a /mama Patented Aug. 26, 1913.

the machine.

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UNiTE-n s'rA ri zgr g rnnr OFFICE.-

WILLIAM B. KING, O F B OSTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATI ON OF NEW JERSEY.

WELT-CONTROLLING MECHANISM.

Specification of Letters Patent.

Patented Aug. 26,191.3.

Application filed March 7, 1912. Serial No. 682.243.

To all whom it may concern:

Be it known that 1, WILLIAM B. KING, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Welt-Controlling. Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as Wlll enable others skilled in the art to which it appcrtains to make and use the same.

The invention relates to welt controlling mechanism for inseam sewing or other machines for attaching welts to shoes.'

In removing a shoe from an inseam sewing machine after the sewing of the seam has been completed the welt is drawn forward through the welt guide and is severed near the end of the seam either by the operator or by welt severing devices incorporated in In the former case, the surplus welt drawn forward by the operator in removingthe shoe should be drawn back, leaving the proper length. of welt pro ecting through the welt guide, while in the latter case the forward movement of the welt as the shoe is withdrawn should be arrested after the proper length of .welt has been drawn forward through the welt guide.

It is the object of the present invention to provide novel and improved mechanism for controlling the welt after the completion of the sewing operation, so that the proper length of welt is left projecting be-- yond the welt guide preparatory to the sew- To this end the invention comprises the features of construction and combination of parts hereinafter described and referred to in the claims.

The invention is illustrated as embodied in a mechanism constructed and arranged to draw back any surplus welt which may have been drawn forward by the operator in removing the shoe to a position where he may conveniently sever the welt, although various features of the invention are applicable to and may be embodied in con trolling mechanisms for limiting the withdrawn] of the welt to the amount requisite for bringing the-"welt into proper position to be severed by welt severing devices.

The various features of the invention will be readily understood from an inspection of the accompanying drawings, and the following description of the construction illustrated therein.

In the drawings, Figure 1 is a side elevation of an inseam sewing machine provided with a welt controlling mechanism embodying the features of the present invention in their preferred forms; Fig. 2 is a plan view of the welt controlling mechanism; Ijig. 3 is a detail side elevation, partly 1n section, of a art of the mechamsm: Fig. 4 is a vertical sectional view through the axis of the welt guiding roll; and Fig. 5 is a detail sectional view illustrating certain parts of the mechanism.

The machine illustrated in the drawings is provided with a needle 1, a feed. point 2, channel guide 3, looper 4, thread finger 5. back rest 6, and the usual cooperating de vices for forming and setting the stitch and feeding the shoe. The machine is also provided with a welt guide 7 for guiding and holding the welt adjacent to the sewing po1nt.' These parts may be of any usual or well-known construction, and are operated in the usual manner. In addition to these devices, the machine is also provided with a welt controlling mechanism embodving the various features of the present illvention, and constructed to draw back a length of welt less by a predetermined amount than thelength drawn forward by the operator in removing the shoe, so that the proper length of welt will remain projecting beyond the welt guide ready for the succeeding sewing operation. As shown, this mechanism comprises a guide roll or pulley 8 about which the welt passes on its way to the welt guide. The welt is led from the welt supply over a guide roll 9 so arranged that the welt wraps about a considerable portion of the periphery of the guide roll 8. The movements given to the welt after the completion of the sewing operation are determined by a controller which in the construction shown comprises-a drum 10 mounted to turn upon a stud 11 and provided with a hub sleeve 10 on which the guide roll 8 is mounted to turn freely. Durmg the sewing the roll 8 turns idly, so that the welt may feed freely to the shoe. After the completion of the sewing operation the pulley, or welt, or both are connected to the controller drum 10 by a clamp 12 carried on the controller drum and arranged to engage the welt and clamp it against the periphery of the roll 8 so that the ro'll, welt and controller will move together..

The clamp is carried on one arm of a bell crank lever 13 pivoted onthe drum and having its arm extending radially to the axis of the drum. The, lever is normally forced in a direction to hold the clamp out of engagement with the welt by a spring 14.

I The lever is moved in a direction to engage the clamp with the welt through a rod 15' mounted within the stud 11. The front end be forced yieldingly against the welt by movement of the bell crank lever '18. The lever 19 is providedwith two segmental bearing surfaces 22and 23,- one or the other of which engages the periphery of a collar 24 secured to the cam shaft 25 of the machine.

During the sewing, the bearing surface 22 rides against the periphery. of the collar 24, and the parts are held in the position indicated in the drawings, with the clamp free of the welt so that the welt is free to move forward as the feed of the shoe progresses. When-the sewing operation has been completed, and the cam shaft of the machine is turned back to bring the thread handling devices into positionfor removahof the shoe, and tore'lieve the tension in the usual man nor, a notch 26 in the collar 24 engages the projection between the segmental surfaces 22 and 23 andswings the lever 19 toward the might, at the same time depressing it so that the bell cranklever 18 is rocked to force the clamp12 against the welt. This connects the controller drum -10 with the welt and guide roll 8' so'that the controller drum rotates with the guide roll 8 when the welt is drawn-forward,'and.the movement of the welt is controlled by controlling the movement .ofi the controller.

In the construction shown the controller drum'is held yieldingly in'normal position by 'a spiral spring 27, one end of which is secured to the drum and the'other end of which. is secured {to the stud 11. The normal position of the controller is determined by an adjustable stop screw 28 arranged to be engaged'by the pivot pin 29 of the clamp carrying lever 13. When the welt is drawn forward by the operator in removing the shoe at the compl tion of the sewing operation, the spring, -is wound up a'nd when the welt is severed from the shoe the spring may be contro acts to return the drum 10 androll' 8 and thus draw the welt back through the-wen guide. The return movement iof "the controller and pulley is. arrested, however, before they reach their normal or initial position, so that aproper length of welt is left projectingbeyond thewelt guide. The devices for thus arresting the controller comprises. stop lever 30 the lower end of which is arrange to cooperate witha stop dog 31 pivoted on the drum .10, and the other end of which is provided with a holesurrounding the end of the rod 15. Aii spring 32 is interposed between the 1 or 30 and a collar' 33 on the rodgsothat the ovement of.

the .rod may continue after the stop lever has reached the limitot its-movement. The stop dog 31 is held yieldingly in position by a spring 34 which-will yield, to allow the stop dog to ride idly by the stop lever when thecontrcller-mbvesiforwardwith the welt, 1 but will retain the dog:.in position to engage the stop lever during'the return movement of the controller drum. The stop lever is projected into'thepath of the stop dog by the movement ofthe rod 15 which engages theclamp 12 with the welt at the completion of the sewing operation. The length of welt left projecting beyond the welt guide may be varied by the adjustment of the stop 28 which determines the initial position of the controller and thenormal posi--' tionof the stop do 31 with relation to the v stop lever 30.

At the beginning of the sewing operation the clamp 12 is actuated to free the welt, and the stop 30 is withdrawn from active position to allow the controller and clamp to be returned to initial position and to allow the welt to move forward independently of the .controller as the sewing progresses. This is accomplished automaticallvby the forward loo rotation of the shaft which returns the lever 19 to the position indicated iii Fig. 1, thus relieving the pressure on the rod.1'5 so, that the spring 14 may rockthe hell crank lever 13 todisengage theclarnpand to shift. the stop levef'from activeposition. The returrj;/;movement of the controller drum -10 andj 'guide' roll 8'by the s ring'27 led by a retarding device so that accu-ratepositioning of the welt is iiisured. In the ficonstruction shown the re tarding devicecompriscs a piston 35 connected with the hub of the controller drum and arranged to reciprocate in a cylinder36, The rod of the piston is-provided with a rack 37 engaged bya pinion 38 which is connec'ted' through gears 39 and 4 0 with the hub .10 of the controller drum. The lower end of the cylinder is connected through a pipe 41 and check valve 42 with a tank 43 containing oil or other suitable liquid. A small 4:4"forms a bypass around the check P val 43 which is controlled 'by a-n ad ustable valve 45. As the controller is rotated in a forward direction 'by the drawing forward of the welt, the piston rises and the liquid flows'freely from the tank 43 through.

46.. The front end of the stud is provided olygonal head to receive a wrench by whic the stud may be turned to secure with a the propcr'adjustment.

' clamp the welt on While it is preferred to employ the specific construction and arrangement of parts shown and described, it will be understood that this construction and arrangement is not essential except so far as it is specified in the claims, and that it may be varied and modified without departing from the broader scope of the invention. It will also be understood that the invention may be embodied in other forms of welt cont-rolling devices. I

Having explained the nature and object of the invention, and specifically described one form of mechanism in which it may-be embodig'd, what I claim is 1. A welt controlling mechanism, having,

in combination, a guide roll for the. welt. a-

clamp, a clamp carrier mounted to turn with the roll about the axis of the roll, means for rendering the clam inactive during the sewing, and means or en gingthe clamp with the welt at the comp etlon of the sewing, substantially as described.

2. A .welt controlling mechanism,having, in combination, a guide roll for the welt, an independently movable clamp carrier concentric with the roll, a clamp, means for rendering the clamp inactive during the sewing, means for engagin the clamp-with the roll at the completion 0 the sew ng, and means for returning the clamp carrier to initial position, substantially as described.

) 3. A welt controlling mechanism, having, in combination, a guide roll,-a clamp carrier concentric with the roll, a clamp arranged to.

the roll, means for. renu i; the clam inactive duri ,the 1i and means or en aging the mp with the welt at the comp ration of the sewing,

. substantially as described.

. 4, A sewing machine, having, in combination, stitch forming mechanism, a controller drum, means for retaining the drum in normal position during 'the sewing, and means rendered active previous to the withdrawal .of the shoe for causing the drum to be rotuted by the welt, substantially as described.

'5. A sewing machine, having, in combina' tion, stitch forming mechanism, a. controller drum, ,means for retaining'the drum 1n-normal position during the sewing, and means rendered active in. bringing the machine into position for theremoval of the shoe for causing the drum to be rotated by the welt, substantially asdescribed.

6. .1A welt controlling mechanism, having, in combination,-a welt retractor constructed to move forward with the welt as the shoe is.

withdrawn a s ring for returning the -re=' tractor to draw back, the welt, and a retarding device for regulatingthe return movementof the retractoi', substantially as de scribed.

7. A welt controlling mechanism, having, in combination, a guide roll fonthe welt, a clamp carrier concentric with the roll, a

clamp, a spring for holding the carrier in normal position,flmeans for actuating the clamp, a stop fort-arresting the carrier before it completes its return movement, and means for'reudering the stop inactive, substantially as'described.

8. A weltcontrollin mechanism, having, in combination, a gui e roll for the welt, a clamp carrier concentric with the roll, a clamp, a stud-on which the clamp carrier is mounted, a spiral spring connecting the stud and clamp carrier, and means for adjustabl securing the stud in position, sub stantially as described.

9. A sewing machine, having, in combination, stitch forming mechanism, a guide roll for the welt, a sleeve on which the roll is mounted and means for connecting the welt, roll and sleeve at the completion of the sewing, substantially as described.

10. A sewin machine, having, in combination, stitch iorming mechanism, a guide roll for the welt, a sleeve on which the roll is mounted, a welt clamp carried by the'sleeve,

a stop for limiting the rotation of the sleeve, and means for en aging the clamp with the welt at the comp etion ofthe sewing, substantially as described.

11. A sewing machine, having, in combination, stitch ormin mechanism, a guide roll for the welt, a c amp, a clamp carrier mounted to turn with the roll, and means for actuating the clamp to grip the welt in bringing the sewing'mechanism' into position for removal of,the shoe, substantially as described.

12. A sewi machine, having, in combi-' nation, stitch ormin mechanism, a guide roll ;for the welt, .a 0 amp, a clamp carrier mountedflo turn with the roll, and' means for actuating the clamp to grip the welt in bringing the sewin mechanism into position for removal o the shoe and for actunting the clar'np to free the Welt during the.

sewing, substantially as desliribed.

' 13. A welt controllingmechanism, haw. in in combination, a guide roll for the we t, a. -clampf-ca,rriet;,concentric with the rol l, a' clamp on' the-carrier, an argn connected with the elamp, an actuator en 'aging. the arm substantially in the axis of the carrier, and means for'eoperating the actuator to render the clamp inectlve during the sewin and to engage the clamp'with the 1 welt at t e. complet10'n);of the sewing s'ubstantiplly 'as descj ibed."

-14. A weltoft-rolling inechanis'rn ha ving, in combinetion; fa gu ide roll, 'aclamp clamp, an actuator engaging the arm sulzstantlall iniheaxis of the carrier,-a spring. for hol V g theclamg earner 1n normal p0.

sition 'during the. sewmg,. and means for operating the actuator to render the clamp inactive durin the sewing, and to engage the clamp with welt at the completion of th sewing, substantially as described.

.- -WILLIAM B. KING.

Witnesses: I

FREDERICK L. ED-MONDS, EMILE HJTARDIUZL.

Coplen 0! this patent may be obtained "for five cer tench, by addressl'n the Commissioner ot Washington, D. C." I I 

